Paper-making machine.



P. A. HEADSON. PAPEEMKING MACHINE. APPLIOATION FILED JUNE 27, 1910.

Patnted 1181221912 3 SHEBTS-SHEBT 1.

F. A. HEADSON. PAPER MAKING MACHINE. APPLICATION FILED JUNE 2v, i910.

Patented Feb. s?, 1912.

s SHBTS-SHEBT 2,

F. A. HBADSON.

PAPER MAKING MACHINE, APPLICATION FILED JUNE 27, 1910.

gmk Patented Fem?, w12.

3SHEETS*SHEET 3.

wma/@5665 f UNITED sTATEs PATENT oEEroE.

FRANK AaHEADSON, OF MILWAUKEE, WISCONSIN, lASSIGlN0R TO H. W. JOHNS- MANVILLE NEW YORK.

To all whom t mg/ concem:

Be it known that I, FRANK AA. Hnanson, a citizen of the v'United States, residing in Milwaukee, in theourty of Milwaukee and State of `Wisconsin., have invented certain new' and useful Improvements in Paper-A Making Machines of which the following is a specification. l

This invention 'relates to that class of paper making machines having a series of drier rolls' or` cylinders over or between which the paper passes in the rocess of being dried, and5 having means for heating the rolls, and-means for subjecting the paper .to the action of a current of air or a series of, currents. or jets of'hot dry air or similar drying Huid applied directly to the paper. The principal object of the invention 1s to provide a simple, economical and eiicient paper making machine.

Further objects if the invention are to provide a paper making machine having a series of drying rolls or cylinders, withv means for introducing steam into the cylinders or rolls for heating them and thereby drying the paper to be operated upon, and means for heating and drying air and applying it directly to the paper for drying the latter; to provide a paper making machine havinga minimum number oLdrying rolls or cylinders, or drying rolls having a millimum area of drying surface, and means for drying and applying dry hotair directly to the paper passing over or through the drying rolls, s o constructed and arranged that a maximum quantity of paper can be dried in a given length of time without heating the' rolls to such a high temperature as to blister orinjure the y'paper in order that the machine may have the required drying capacity; to` provide means whereby exhaustl steam may be employed for heating and drying the lair to be applied directly to the paper and also forv heating the rolls, and whereby the expense of heating the rolls and air and drying the paperis reduced to a minimum, and the overheating of the rolls` and blistering and injury of the paper is avoided without reducing the drying capacity of the machine and without the necessity of increasing the number of rolls and the paper.`

A further object ot' the invention is to provide a machine having the maximum 'thcrebiY increasing the liability ofrbreaking Specification of Letters Patent. Application ledune 27, 1910. Serial No. 569,117.

COMPANY, 0F MILWAUKEE, WISCONSIN, A CORPORATION OF PAPERfMAKINe MACHINE.

Patented Feb. 27, 1912.

drying capacity and adapted to occupy the .minimum of space, and to provide means whereby the use of an apron of felt for supporting the paper as 1t passes through the drying rolls may be dispensed with without increasing the liability to breakuthe paper in provided'with my improvements, with parts omitted; Fig. 2,'a view in vertical'section taken on line 2 of Fig. l, looking in the di` rection ofthe arrow, and showing the paper lpassing over or throughthe rolls', and the means for applying airl directly to the paper; Fig. 3, an enlarged' detail view of an upper drying roll and a lower drying roll, and the manifolds for supplying steam for heating the rolls and for removing water re'- sultmg from condensation from the rolls, the top roll and manifolds being shown in sect-ion; Fig. 4, an' enlarged view .in vertical elevation of the steam coil and the casing for heating the air, taken on line 4 of Fig. 1 looking in the direction of the arrow; and Fig. 5, a horizontal sectional view lof the de` vice shown in Figjt, taken on line 5 ofxsaid figure. i

In constructing a paper making 4machine in accordance with my invention Iy rovide a frame a,w hich may beba-ny Adesired, ordinary, or well known form. A set or series of hollow AmetallicJ dryin `rolls or cylindermb are rotatably mounte in parallel relation in suitable journal bearings c in the main frame a. These'rolls are in staggered relation with their axes -parallel and lying transversely with respect to the direction of movement of the paper to be operated upon, and are a sufficient distance from one another to provide spacesthere between adapted to admit and permit-the passage of the paper in the form of a c0ntinuous web from t-he felt apron ZZ, at the so called wet end at t-he receiving end of, the series ofA dryin rolls, .to the discharge end of the same. `wound upon and'between the drying rolls he web of paper e is sol llO b (both upper and lower) are provided with stub shafts or journals at one end, and hollow shafts g operatively connected by means of gear wheels z, at the opposite ends of said rolls respectively. The upper gear wheels are in toot-hed engagement with the next adjacent lower gear wheels in the order of their arrangement, so that the direction of rotation of the gears and the respective rolls corresponds with the direction of movement of the web of paper passing through the rolls from lower to upper rolls alternately.

Each of the rolls b is hollow and forms a chamber i adapted to receive steam or similar heating fluid for heating the roll and thereby heating and drying the paper.

In the art to which this'invention relates 1t 1s well known that the use of an excessive.

number of drying rolls resultsin the paper being frequently .broken and greatly increases bot-h the expense of construction and the expense of operation; that the heating of the rolls to too high a 'tei'nperaturejin order to obtain the maximum capacity with the minimum number or a given number of rolls results in blistering and injuring the paper, and necessitates or implies the use of ve steam or a heating fluid kept-.at a high- 'temperature which in turn implies a greatly` increased expense in operation as compared with the use of exhaust steam in accordance with this invention, for the purpose of heating the rolls and for the urpose of heating and dryin air and app ying the air thus heated an dried directly to the paper for the purpose of dr ing the latter. .It will also be readily u-nderstoodby those skilled in the art that by using heated ai'r applied directly to the ,paper on the outside of the rolls, and using-exhaust steam' for heating the air and also upon the inside of the rolls for heating them and thereby coperziting with the dry air in drying the paper, the number and the area of heating surface of the rolls may be reduced to a minimum and all of the accompanying advantages of nonbreakagc of paper and economy of construction and of operation obtained without increasingr tlte temperature of the rolls to an undesirable extent or to any extent for the purpose of obtaining the said advantages, and that. at the same time or by the employment of theherein described means and method of drying thel Apaper the blistering` 0f spaee in proportion to the capacity required, I provide a manifold /c for the upper series of rolls b, and a manifold l, which Amay, be of identical construction with said manifold lc, for the lower series of rolls. A

-series of pipes or tubes 1n form passages n which lead into the interiors or chambers z' of the respectiveupper rolls through the hollow shafts g, and cach of which pa :a n communicates with the interior or chainber o of said manifold lu. rl.`he,lo.wer manifold Z is provided with a series of hollow tubes or pipes p which are of identical construct-ion with the pipes m, and'form passages which connect, the interior or chamber Q ofthe lower manifold Z with the lower rolls b through the hollow shafts gof said lower rolls, thereby forming passages leading from said lower manifold into the interior. of the respective lower rolls b. 'The manifolds c and Z are connected with a source of steam supply by means of inlet pipes-1' and s which `are by preference connected With an exhaust port or pipe t of an engine by means ofan interposed pump 'u adapted to force exhaust steam through the ipes s and r and manifolds la and Z into4 the interior of the rolls b." An upper manifoldv` forms a chamber w and is provided with a seriesAof pipes y each Ofwhich leads through a tube m and hollow shaft g and into the inner chamber i of an upper roll Z), the inner ends of the tubes y being bent downward inside of the rolls o, as shown in Fig. J3 .sous to form an outlet: for water from each of said rolls, whereby water resulting from condensation o'f steam in thc rolls is forced from the rolls and into the manifold by the pressure of the steam. A lower manifold e, which may be of identical construction with the manifold 'n is provided with a series of pipes 2. which are of the saine construction as die pipes y, and each of which leads into a lower roll 7i 'through a pipe u and communicates with the chamber 3 formed by said inanitoli'l s. The manifolds e and .e communicate-witli.a suitable out-let pipe It through which the water from t-he interior of the rolls o is discharged.

In order Vto provide means for heating and applying air directly tothe paper` a series of pipes 5, each having an opening preferably in the form of a longitudinal pcriphcral slotv 6 are mounted adjacent to and preferably below the paper with'the slots or discharge openings directed toward the paper. I prefer to so arrange theseair pipes that they, and the discharge openings are disposed tranwcrscly with respect lo (he paper, and to provide a sufficient number olI lsaid. pipes so that there will be one i'or cach of the louclhcating and drying rollsI o. ly mounting a pipe 5 beneath each bottom roll I) and in sldistantlallyvi.-ws'iecl llt,

relation thereto the jets of air discharged from the spouts or slots 6 come in contact 'with the under side of the paper, or the side adjacent to the slots and pass upward between the bottom rolls b and between` the laps of paper between said rolls and are dellected back and forth in the space between the laps of the paper in ,such a manner as to thoroughly dry. the paper, and 'particularly the 'side of the paper which 1s away from the bottom drying rolls. These slotted pipes or elongated nozzles 5 are all connected with the interior chamber or air supply passage formed by a hollow manifold 7 by means of pipes 8, theupper ends of which are connected or integral with the corresponding slotted pipes or nozzles 5, and the lower ends of which open into the manifold or main air supply pipe '1;

A steam coil 8', in a casing 9, and havingl a st eam supply pipe 10 connected with a source of steamsupply-preferably the exhaust port of an engine, which may be the engine which operates the drying rolls-is provided with a fan or blower llrhaving an air inlet 12 which communicates with the spaces 13 inside of the casing 9 and between blower is provided with a driving shaft'l. -upon'which is mounted a driving pulley or wheel 16 by means of which the fan or blower is adapted to be connected with a' suitable `source of Wer, such, for -instance as the engine whic bdrives the drying rolls and which. may furnish the exhaust steam for heating the drying rolls and for heating and A'drying the air which is applied to the paper by the fan and the pipes whichv lead therefrom. Forconvenience, the manifold 7 and ipes 8 are located in a pit 17 be-A neath tie main frame of the machine and beneath the drying rolls.

v'lhe rolls b 4are operatively connected with a suitable source of power by means of a Shaft 18 having a spur gear 19 theref on .in toothed engagement with one of the connected gear wheels lz., and having a beltpulley 20', adapted to be connected with the engine which supplies the'steam for heating the rolls and the air for rying the paper, or with any desired source of power. The connection of thewheels h with the source of power may be' made in any desired, ordinary or known manner.

Rolls 18, arranged in pairs at suitable intcrvals parallel with and Vabove the upper series of rolls b, and each pair having a roll 19 below the level thereofand adjacent to the rolls between which a lap of the web f of papenpasscs upward and over t-he pairs of rolls 18 and then down to the corresponding 'roll 19 and onto upper rolls b in such a manner as to form a triangular space 20 between laps of the paper, are journa-led in suitable supports or frame portions 21. In each triangular space 20 and inside fold or air supply pipe 7 by means of a by means of pipes 8, as shown in Fig. V2.

By the use of-the laps or skips arfranged'at suitable intervals above the main' series of drying rolls inconnectionwith the means 4for heating andapplyin'g jets of." air directly to the paper, thus reducing to a" minimum the number fof heating 'rollsnecessary in order to'obtain-the required ca-j pipe 24, the lower ends ofwhich may be connected withfthe main air supply pipe pacity, the paper issothorougly dried ,wit-hi l; I

out blistering or injury from over= heatingor from Passingoverpand-being -subjecte l to strains from too llarge a'number' of rolls',

that the use of an apron 'of felt orsu'ppo'rb' ing t-he paper :is it passes oyeror through the drying rolls is dispensed with, and the capacity of the machine or of a 'givexrnum ber of drying rolls is thus still furtherincreased by dispensingwith the felt, which tends to revent or retard evaporation,l 1 From t e foregoing it will be readily Seen that, while the blisteringtof V'the ipaper'.i s

liable to result from ,merelymalntainingfthe .rolls at too high a tetr'lperature, the.'i4 -tendency'to blister is increased by the use of an apron of felt or 4similar.material,--

which tends to confine the moisture .in theff paper which is between the felt -andt-he paper is greatly reduced and the quality 'of the paper is improved. When, in additionl -115- J-drying rolls, and that-by dispensing withffi i i' the apron of felt the tendency to blister t h;e. -4

metallic rolls rotatably mounted and provided with spaces` therebetween for receiving a web ot' paper to be dried, steam pipes conuuunicating with the interior of the rolls respectively, means for connecting the steam pipes with the exhaust port of an eugine, air pipes on the outside of the rolls, 5 provided withdiseharge openings 011 the side toward the rolls, means for drying a supply of air for said pipes, and means for forcing dry air through the air pipes and into contact with the paper.

Q. In a machine of the class described,the combination of a series of parallel hollow metallic rolls rotatably mounted and operatively connected, and provided with spaces therebetween for receiving a web' of paper to be dried, steam pipes communicating with the interior of the rolls respectively, means forV connecting the steam pipes with the exhaust port of an engine, air pipes on the outside of and in parallel relation to th rolls and provided with discharge openings on the'slde toward the rolls, a steam coil, means for. connecting the steam coil 4. with the exhaust port of an engine, a-casing in which the steam coil is mounted, and a fanor blower having its inlet connected with the casing in which the steam coil is loeated,-and its discharge opening communicating with the air pipes.

3. In a machine of the class described, the

combination of a series of parallel hollow metallic rolls rotatably mounted and provided with spaces therebetween :tor receiv- .a source of steam supply,

communicating with the interior of said rolls and with a source rolls mounted above and parallel with the series of hollow rolls and on the inside of a lap of the web of paper to be dried, and an air pipe located on the inside of the lap ot' the web of paper above the hollow rolls and 40 connected with a source of air supply, and provided with lateral openings.

4. In a machine of the class described, the combination of a series ot parallel hollow metallic rolls rotatably mounted and provided with spaces therebetween, for receiving a web of paper to be dried, steam pipes communicating with the interior of said hollow rolls respectively and connected. with air pipes below ,50 and in parallel relation to the hollow rolls'- and provided with discharge openings -on the side toward the hollow rolls, paper supporting rolls mounted above and parallel with the hollow rolls and 011 the inside of a lap of the web of paper to be dried, an air pipe located on the inside ot' said lap of the web of paper above the hollow rolls and provided with discharge openings adjacent to the web of paper, and means for forcing dry air through said air pipes.

FRANK A. HEADS'ON.

Witnesses:

ing a web of papei to be dried, steam pipes Gus A. TANDBERG, I. A. BROCKMAN.

of steam supply, 35 

